Correlation of electrophysilogic indices of electroencephalograms (EEG) and caused potentials in convalescents after hemorrhagic fever with renal syndrome (HFRS)

Changes of caused potentials at hemorrhagic fever with renal syndrome have been studied, as well as correlation of these indices to EEG data. Mathematical and statistical analysis of EEG parameters and caused potentials in convalescents after HFRS showed significant deviations in brain bioelectric activity; these deviations being characterized by a considerable decrease of amplitude characteristics of the EEG basic rhythms with a tendency to rhythm frequency lowering practically in all cerebral cortex regions, prolongation of latent periods and decrease of caused potentials amplitude. Changes in visual caused potentials can indicate to the cerebral demyelinization process. This correlation analysis has revealed an interchange between different electrophysiologic characteristics.